Using minimum storage sizes, storage sizes less than or not on a 64K boundary for architecture level
ALS0 (S/370) or not on a 1M boundary for architecture level ALS1 (ESA/390) and higher, it may be pos-
sible to generate error conditions not covered by the “Principles of Operations”.

Use of storage sizes greater than supported by the guest operating system may generate incorrect re-
sults or error conditions within the guest operating system.

5.23.4 Overview Storage Allocation Units

Unit

Multiplier

Name (Symbol)

IEC Name (IEC Symbol)

Restrictions

B

None

Byte (B)

Byte (B)

Main storage only

K

2**10

Kilobyte (kB)

Kibibyte (KiB)

Main storage only

M

2**20

Megabyte (MB)

Mebibyte (MiB)

G

2**30

Gigabyte (GB)

Gibibyte (GiB)

T

2**40

Terabyte (TB)

Tebibyte (TiB)

Not on 32-bit machines

P

2**50

Petabyte (PB)

Pebibyte (PiB)

Not on 32-bit machines

E

2*60

Exabyte (EB)

Exbibyte (EiB)

Not on 32-bit machines

Table 5: Storage Allocation Units

5.23.5 Examples

Example 1:

Set the size of the main storage to 1024 MB. Do not lock the memory into the storage.

DEFSTORE MAIN 1024

or

DEFSTORE MAIN 1024 UNLOCK

or

DEFSTORE MAIN 1024M

or

DEFSTORE MAIN 1024M UNLOCK

Example 2:

Set the size of the expanded storage to 256 MB. Do not lock the memory into the storage.

DEFSTORE XSTORE 256

or

DEFSTORE XSTORE 256M

or

DEFSTORE XSTORE 256 UNLOCK

or

DEFSTORE XSTORE 256M UNLOCK

Example 3:

Set the the main storage to 2 GB, the expanded storage to 512 MB and lock the memory into the storage.

DEFSTORE MAIN 2048 LOCK XSTORE 512 LOCK

or

DEFSTORE MAIN 2048M LOCK XSTORE 512M LOCK

or

DEFSTORE MAIN 2G LOCK XSTORE 512M LOCK

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